Thermal Stabilities, Physical and Optical Properties of K2O-Na2O-Nb2O5-TeO2 Glasses

Euh Duck Jeong; Myoung Gyu Ha; Hyuk Kyu Pak; Bong Ki Ryu; Pramod H. Borse; Jae Sung Lee; Takayuki Komatsu; Hae Jin Kim; Hyun Gyu Kim

Journal of Industrial and Engineering Chemistry, Vol.12, No.6, 926-931, November, 2006

Euh Duck Jeong, Myoung Gyu Ha, Hyuk Kyu Pak¹, Bong Ki Ryu², Pramod H. Borse², Jae Sung Lee², Takayuki Komatsu³, Hae Jin Kim⁴, and Hyun Gyu Kim^{1, †}

Busan Center, Korea Basic Science Institute(KBSI), Busan 609-735, Korea
¹Department of Physics, Pusan National University, Busan 609-735, Korea
²Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea
³Department of Chemistry, Nagaoka University of Technology, Nagaoka 940-21, Japan
⁴Energy Nano Material Team, Korea Basic Science Institute, Daejon 305-333, Korea

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The thermal stabilities, physical and optical properties of xK2O-(14-x)Na2O-14Nb2O5-72TeO2 (x = 0 ∼12 mol%) glasses have been studied. The glasses consisting of ca. 10 mol% K2O show high thermal stabilities with values of △T = Tx - Tg = ca. 105 oC against crystallization, where Tg and Tx are the glass transition and crystallization onset temperatures, respectively. The activation energy of grain growth of a cubic crystalline phase in the 10K2O-4Na2O-14Nb2O5-72TeO2 glass was 7.92 kJ/mol. The energy required for the phase transformation from the 10K2O-4Na2O-14Nb2O5-72TeO2 glass to the cubic crystalline phase was 190.74kJ/mol. The optical and physical properties of the K2O-Na2O-Nb2O5-TeO2 glasses were obtained: refractive index, n = 1.88-1.97; ρ= 4.22-4.64 g/cm3; optical energy band of the transmission cut-off wavelength, Eg (eV) = 3.17-3.14; relative permittivity, εr, = 28-29. The values of RM and αm for K2O-Na2O-Nb2O5-TeO2 glasses were much larger than those of Na2O-Nb2O5-TeO2 glasses.

Keywords:TeO2 glasses;refractive index;molar volume;thermal stability;activation energy

[References]

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Kim HG, Komatsu T, Shioya K, Sato R, Komatsu K, Tanaka K, Hirao K, J. Non-Cryst. Solids, 208, 303 (1996)
Sakai R, Benino Y, Komatsu T, Appl. Phys. Lett., 77, 2120 (2000)
Tanaka K, Kashima K, Hirao K, Soga N, Mito A, Nasu H, J. Non-Cryst. Solids, 185, 123 (1995)
Kim SH, Yoko T, J. Am. Ceram. Soc., 78, 1061 (1995)
Jeong ED, Borse PH, Lee LS, Ha MG, Pak HK, Komatus T, Kim HG, J. Ind. Eng. Chem., Submitted
Lin KL, J. Ind. Eng. Chem., 11(6), 834 (2005)
Lee HW, Park BK, Tian MY, Lee JM, J. Ind. Eng. Chem., 12(2), 295 (2006)
Ray JC, Park DW, Ahn WS, J. Ind. Eng. Chem., 12(1), 142 (2006)
Kim SH, Yoko T, J. Am. Ceram. Soc., 76, 865 (1993)
El-Mallawany R, J. Mater. Sci. Mater. Electron., 6, 1 (1995)
Cullity BD, Elements of X-Ray Diffraction, 2nd Edn. Addison-Wesley, Reading, MA (1978)
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Kissinger HE, J. Res. Natl. Bur. Stand, 57, 217 (1956)

[Related Articles]

[1] Stanworth JE, Nature, 169, 581 (1952)

[2] Stanworth JE, J. Soc. Glass Technol., 38, 425 (1954)

[3] Tanaka K, Yoko T, Yamada H, Kamiyama J, J. Non-Cryst. Solids, 103, 250 (1988)

[4] El-Mallawany R, J. Mater. Res., 7, 224 (1992)

[5] Heo J, Lam D, Sigel G, Mendoza E, Hensley D, J. Am. Ceram. Soc., 75, 277 (1992)

[6] Abdel-Kader A, Elkholy M, J. Appl. Phys., 73, 71 (1993)

[7] Wang JS, Vogel EM, Snitzer E, Opt. Mater., 3, 187 (1994)

[8] Balaya P, Sunandana CS, J. Non-Cryst. Solids, 162, 253 (1993)

[9] Sekiya T, Mochida N, Ohtsuka A, J. Non-Cryst. Solids, 185, 135 (1995)

[10] Sekiya T, Mochida N, Soejima A, J. Non-Cryst. Solids, 191, 115 (1995)

[11] Kowata Y, Habu K, Adachi H, Chem. Express, 7, 965 (1992)

[12] Shioya K, Komatsu T, Kim HG, Sato R, Komatsu K, J. Non-Cryst. Solids, 189, 16 (1995)

[13] Kim HG, Komatsu T, Shioya K, Sato R, Komatsu K, Tanaka K, Hirao K, J. Non-Cryst. Solids, 208, 303 (1996)

[14] Sakai R, Benino Y, Komatsu T, Appl. Phys. Lett., 77, 2120 (2000)

[15] Tanaka K, Kashima K, Hirao K, Soga N, Mito A, Nasu H, J. Non-Cryst. Solids, 185, 123 (1995)

[16] Kim SH, Yoko T, J. Am. Ceram. Soc., 78, 1061 (1995)

[17] Jeong ED, Borse PH, Lee LS, Ha MG, Pak HK, Komatus T, Kim HG, J. Ind. Eng. Chem., Submitted

[18] Lin KL, J. Ind. Eng. Chem., 11(6), 834 (2005)

[19] Lee HW, Park BK, Tian MY, Lee JM, J. Ind. Eng. Chem., 12(2), 295 (2006)

[20] Ray JC, Park DW, Ahn WS, J. Ind. Eng. Chem., 12(1), 142 (2006)

[21] Kim SH, Yoko T, J. Am. Ceram. Soc., 76, 865 (1993)

[22] El-Mallawany R, J. Mater. Sci. Mater. Electron., 6, 1 (1995)

[23] Cullity BD, Elements of X-Ray Diffraction, 2nd Edn. Addison-Wesley, Reading, MA (1978)

[24] Coble RL, J. Appl. Phys., 32, 787 (1961)

[25] Jarcho M, Bolen CH, Thomas MB, Bobick J, Kay JF, Doremus RH, J. Mater. Sci., 11, 2027 (1976)

[26] Kissinger HE, J. Res. Natl. Bur. Stand, 57, 217 (1956)